Satellite Internet forum | |
https://www.satsig.net/cgi-bin/yabb/YaBB.pl
VSAT technology and installation >> iDirect Forum: hubs and terminals >> Question about iDirect 3100 Option file https://www.satsig.net/cgi-bin/yabb/YaBB.pl?num=1238327394 Message started by tech-vsat on Mar 29th, 2009 at 12:49pm |
Title: Question about iDirect 3100 Option file Post by tech-vsat on Mar 29th, 2009 at 12:49pm
Hello,
I have question about Idirect Modem Option file. I would want to know the Symbol Rate and Receive frequncy. Lets say I have one Option file for one Idirect modem and might be there some problem that I can not Point the antenna through ISITE.... Â how should I find the symbol rate and Frequncy to Point the antenna with Satellite Meter. |
Title: Re: Question about �Idirect 3100 Option file Post by TDMAMike on Mar 29th, 2009 at 1:34pm
[MODEM_PARAMETERS]
rx_freq = 1213000000 rx_acqrange = 100000 rx_bitrate = 4097132 rx_mode = 2 rx_modtype = 1 rx_fecrate = 20 rx_scram = 1 rx_diff = 0 rx_specinv = 0 tx_freq = 1000000000 tx_bitrate = 2048075 tx_mode = 0 tx_modtype = 1 tx_clksource = 0 tx_fecrate = 15 tx_scram = 1 tx_diff = 0 tx_specinv = 0 tx_power_in_dbm = -15.000000 rx_fsd = 156929 tx_spreading_factor = 1 rx_spreading_factor = 1 tx_spread_enable = 0 rx_spread_enable = 0 is_demod2_active = 0 rx_symrate = 3841999.238095 tx_symrate = 1291000 Rx_bitrate sets the units data rate in bits per second. That value reflects the payload's coded rate. BitRate = (Desired Symbol Rate) x (Modulation Factor) x (Coding Rate) |
Title: Re: Question about �Idirect 3100 Option file Post by tech-vsat on Mar 29th, 2009 at 1:51pm
Hi Mike
As per below example. Let say I want point or track it by Horizon satellite meter. How should I put freq and symbol rate on it. [MODEM_PARAMETERS] rx_freq = 1213000000 rx_acqrange = 100000 rx_bitrate = 4097132 Thanks in advance |
Title: Re: Question about iDirect 3100 Option file Post by Eric Johnston on Mar 29th, 2009 at 5:44pm
The long [MODEM PARAMETERS] listing above is interesting as is also shows the calculated rx and tx symbol rates.
I would guess that rx_modtype = 1 means QPSK or 2 bits per symbol But what does rx_fecrate = 20 mean ? Well 1 / ( 3841999 x 2 /4097132 ) = 0.533 which is one of the listed FEC rates. So rx_fecrate = 20 means 0.533 FEC. Look for a carrier with 3.842 Msps symbol rate with a Horizon meter. The receive frequency in the cable will be 1213 MHz. Â On a spectrum analyser the top of the carrier will about 3.842 MHz wide and the width overall about 1.35 to 1.4 times this or about 5.2 MHz occupied transponder bandwidth. I've not seen options file examples before which include the rx_symrate and tx_symrate shown. Best regards, Eric. |
Title: Re: Question about �Idirect 3100 Option file Post by TDMAMike on Mar 29th, 2009 at 9:23pm
QPSK is correct.
rx_modtype: 0 = BPSK 1 = QPSK 2 = 8PSK 3 = 16 PSK |
Title: Re: Question about Idirect 3100 Option file Post by Forum Admin on Mar 30th, 2009 at 8:17am
Mike has told me:
8.2.2 and above options files specify the symbol rates on the tail end of the [MODEM PARAMETERS] I have edited the above messages to make the number of zeros in the frequency correct. Best regards, Eric. |
Title: Re: Question about Idirect 3100 Option file Post by tech-vsat on Mar 30th, 2009 at 11:36am
Hi,
Lets give us the Example of below Option file, which I am looking for........ [OPTIONS_FILE] modem_sn = 108714 modem_type = Remote modem_hardware = 3100 did = 5089450 generated_by = NMS version $Name: NetModem-7_0_2 $ is_mesh = 0 [SECURITY] password = $ admin_password = $ [NMS] timeout = 20000 server_ip = XXXXXXXXXX broadcast_ip = XXXXXXXXXX keep_alive_port_number = 2860 NRD_server_ip = 192.168.204.132 NRD_remote_status_port_number = 2859 service_monitor_interval = 1000 download_monitor_group = 239.192.0.0 download_monitor_port = 9000 download_monitor_credentials = 1 is_nms_managed = 1 [VLAN] mode = 0 vid = 1 [ETH0_1] address = XXXXXXXXXXX netmask = 255.255.255.248 rip_enabled = 1 [DNS] dns_enable = 1 dns_cache_enable = 1 dns_cache_size = 100 dns_cache_ttl_min = 300 dns_cache_ttl_max = 86400 dns_forward_queue_size = 1000 dns_forward_timeout = 2000 dns_primary_server_name = ns1 dns_primary_server_addr = 217.10.162.8 dns_secondary_server_name = ns2 dns_secondary_server_addr = 217.10.160.8 [ROUTE_1_0] interface = sat0 network = 0.0.0.0 netmask = 0.0.0.0 gateway = 0.0.0.0 metric = 1 [SAT0_1] address = 10.0.1.58 netmask = 255.255.255.0 rip_enabled = 1 [ETH0] interface = ixp0 phy_count = 1 [LAN] lan_ip = 125.213.202.97 lan_subnet_ip = 255.255.255.248 lan_gw_ip = 0.0.0.0 [MODEM_PARAMETERS] data_port = 0 loopback = 0 interface_type = 0 rx_freq = 1628059999 rx_acqrange = 1800000 rx_bitrate = 7923077 rx_mode = 2 rx_modtype = 1 rx_fecrate = 15 rx_scram = 1 rx_diff = 0 rx_specinv = 0 tx_freq = 1000000000 tx_bitrate = 1012759 tx_mode = 0 tx_modtype = 1 tx_clksource = 0 tx_fecrate = 15 tx_scram = 1 tx_diff = 0 tx_specinv = 0 tx_power_in_dbm = -9.000000 rx_fsd = 4044 is_demod2_active = 0 [ACQUISITION_PARAMETERS] fsd = 72828 [UCP] power_uplink_control_processing = 1 max_power_level_in_db = -5.000000 [ODU] music_present = 0 odu_rx_dc_power = 1 odu_rx_10_mhz = 0 odu_tx_dc_power = 1 odu_tx_10_mhz = 1 odu_disable_tx_pwm = 0 [TDMA] tx_watchdog_timeout_in_frames = 2 [TIMEPLAN] fec_blocks_per_outroute_frame = 305 symbols_per_inroute_frame = 79847 outroute_fec_block_len = 512 outroute_fec_type = 793 inroute_fec_block_len = 512 inroute_fec_type = 793 unique_word_len = 32 symbols_per_outroute_frame = 624671 num_acq_slots = 1 aperture_traffic = 8 aperture_acq = 1095 num_traffic_slots = 36 payload = 2048 skip_slots = 2 [LL] ll_open_active = 1 ll_tx_window = 1024 ll_rx_window_backoff = 102 ll_rx_window = 1024 ll_t1_timeout = 4000 ll_t2_timeout = 1000 ll_t3_timeout = 5000 ll_t4_timeout = 1500 ll_t1_retry_limit = 5 [SPOOF] spoof_debug_level = 0 spoof_passthru = 0 spoof_timeout = 100 spoof_oos_buffer_size = 64240 spoof_keepalive_timeout_ms = 6000 spoof_fwd_ack_ms_timeout = 200 spoof_fade_timeout = 120000 spoof_reap_timeout = 480000 spoof_syn_timeout = 120000 spoof_max_sessions = -1 spoof_accel_connect = 1 spoof_accel_port = 80 spoof_retx_buffer_size = 105605 spoof_peer_retx_buffer_size = 93087 spoof_merge_on = 0 spoof_compression_on = 0 [MODEM_INSTALLATION] hub_lat = 52.238000 hub_long = 359.517000 remote_lat = 34.320000 remote_long = 69.100000 spacecraft_long = 53.000000 reflector_offset_angle = 22.600000 [FREQ_TRANS] down_translation = 10000.000000 up_translation = 13050.000000 [DEBUG] cpu_util_test_enabled = 0 [GUI_SERVER_PROXY] port = 14599 [SAR] tx_segment_size = 70 tx_passthru = 0 rx_passthru = 1 [SERVICE_LEVEL_0] name = DEFAULT type = cost_based cost = 0.500000 max_depth_packets = 564 max_depth_bytes = 28206 max_depth_ms = 250 drop_oldest_uis_first = 1 rt_weight = 0.000000 cir_trigger = 1 [SERVICE_LEVEL_1] name = NMS_TCP type = priority priority_min = 76 priority_max = 100 priority_step = 1 max_depth_packets = 250 max_depth_bytes = 3004 max_depth_ms = 20 drop_oldest_uis_first = 1 rt_weight = 0.000000 cir_trigger = 0 [SERVICE_LEVEL_1_RULE_1] PROTOCOL = EQUAL 6 DEST_IP_ADDR = EQUAL 192.168.204.132 [SERVICE_LEVEL_2] name = NMS_UDP type = priority priority_min = 76 priority_max = 100 priority_step = 1 max_depth_packets = 564 max_depth_bytes = 28206 max_depth_ms = 250 drop_oldest_uis_first = 1 rt_weight = 0.000000 cir_trigger = 0 [SERVICE_LEVEL_2_RULE_1] PROTOCOL = EQUAL 17 DEST_IP_ADDR = EQUAL 192.168.204.132 [SERVICE_LEVEL_3] name = NMS_ICMP type = priority priority_min = 76 priority_max = 100 priority_step = 1 max_depth_packets = 564 max_depth_bytes = 28206 max_depth_ms = 250 drop_oldest_uis_first = 1 rt_weight = 0.000000 cir_trigger = 0 [SERVICE_LEVEL_3_RULE_1] PROTOCOL = EQUAL 1 DEST_IP_ADDR = EQUAL 192.168.204.132 [SERVICE_LEVEL_4] name = UDP type = cost_based cost = 0.100000 max_depth_packets = 564 max_depth_bytes = 28206 max_depth_ms = 250 drop_oldest_uis_first = 1 rt_weight = 0.000000 cir_trigger = 1 [SERVICE_LEVEL_4_RULE_1] PROTOCOL = EQUAL 17 [SERVICE_LEVEL_5] name = TCP type = cost_based cost = 0.500000 max_depth_packets = 250 max_depth_bytes = 3004 max_depth_ms = 20 drop_oldest_uis_first = 1 rt_weight = 0.000000 cir_trigger = 1 [SERVICE_LEVEL_5_RULE_1] PROTOCOL = EQUAL 6 [ENC] id = 5089450 is_encrypted = 0 enc_algorithm = dynamic enc_algorithm_mode = dynamic [NET_ENC] id = 1 is_encrypted = 0 [UDP] passthru = 1 force_udp_fullheader = 1 force_rtp_fullheader = 1 payload_comp = 0 max_hdr_comp_packet_size = 180 [COMPRESSION] Threshold = 90 [PAD] partial_passthru = 0 [OOB] mem_low_percent = 75 mem_high_percent = 90 [TX] device_path = /dev device_mode = tdma device_name = tx [RX1] device_path = /dev device_mode = scpc device_name = rx1 [BTP] device_path = /dev device_mode = tdma device_name = btp [SOF] device_path = /dev device_mode = tdma device_name = sof [SATELLITE] min_look_angle = 0.000000 [SYSTEM_TRAY] mode = 1 server = 192.168.204.132 port = 2859 interval = 5000 service_monitor_group = 239.255.255.1 service_monitor_port = 9001 Thanks in Advance for Helping [ edited by form admin: passwords removed ] |
Title: Re: Question about Idirect 3100 Option file Post by Forum Admin on Mar 30th, 2009 at 11:46am
We need to find out what fecrate = 15 means.
Does anyone with an 8.2.2 have an options file and fecrate = 15. If so what are your rx_bitrate, rx_modtype, and rx_symrate ? From that we can work out what fecrate = 15 means and from that what the symbol rate is for a pre 8.2.2 options file with fecrate = 15. Best regards, Eric. |
Title: Re: Question about Idirect 3100 Option file Post by TDMAMike on Mar 30th, 2009 at 12:09pm
15 is normally indicative of long block 3249/4096. Possibly .495.....Give me some time and I will run it to ground.
M |
Title: Re: Question about Idirect 3100 Option file Post by tech-vsat on Apr 1st, 2009 at 9:09am Hi Mike, Still waiting for the Positive answer. Hope to get it soon . Appreciate you’re Cooperation in Advance |
Title: Re: Question about Idirect 3100 Option file Post by Eric Johnston on Apr 2nd, 2009 at 2:59pm
I've solved it. Just seen someones option file and screen display.
FEC code 15 means 3249/4096 = 0.793 So anyone can now work out symbol rate is they are less than 8.2.2 using: rx_modtype: 0 = BPSK 1 = QPSK 2 = 8PSK 3 = 16 PSK rx_fecrate 15 = 0.793 20 = 0.533 Best regards, Eric. |
Powered by YaBB 2.5.2! YaBB Forum Software © 2000-. All Rights Reserved. |