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Operation PSM-500/500L/500LT SCPC Satellite Modem
Page 3-16 PSM-500/500L/500LT - Rev. 0.91
Table 3-6. Modulator Parameter Detail
Modulator Parameter Detail
Representation
Type
Entry
Description
Status CXR
Sending, OK
Read Only Read Only Modulator Carrier Status
Status Data
NO DATA
Read Only Read Only Modulator Input Data Status
Status Clock
Internal, OK
Read Only Read Only Modulator Bit Rate Clock
Status
Status Test
Normal
Read Only Read Only Modulator Test Status
IF Frequency
70.000000MHz
Numeric 50.000 000 to 90.000 000
MHz
Carrier center frequency
IF Offset
–8.031kHz
Numeric –1,250.000 to +1,250.000
kHz
Carrier offset frequency
IF Level
–20.4dBm
Numeric +5.0 to –35.0 dBm
+3.0 max at 50Ω
Transmit output power level
IF Output
Enabled
Selection 0 = Disable, 1 = Enable Carrier output enable
IF Modulation
QPSK
Selection 0 = BPSK, 1 = QPSK,
2 = OQPSK, 3 = 8PSK,
6 = 16QAM
Modulation Mode. Some
values left available for new
options.
IF Spectrum
Normal
Selection 0 = Normal, 1 = Inverted Modulation Spectrum control
IF Filter Mask
Normal
Selection 0 = IESS, 1 = Legacy Modulation Spectrum Filter
Control. Legacy for PSM-
4900 compatibility.
»IF Mode
Continuous
Selection 0 = Continuous, 1 = Burst Only available with burst
option installed.
»IF Preamble
64 Symbols
Selection 0 = 32, 1 = 64 Symbols Selects preamble length when
burst option installed.
IF AUPC
Disabled
Selection 0 = Disable, 1 = Enable Automatic Uplink Power
Control
»IF AUPC Eb/No
6.5dB
Numeric 3.0 to 20.0 dB AUPC remote receive Eb/No
level set point.
»IF AUPC Max Lvl
–10.0 dB
Numeric +5.0 dBm to Minimum level Max. Transmit level under
AUPC control
»IF AUPC Min Lvl
–20.0 dB
Numeric Maximum level to –35 dBm Min. Transmit Level under
AUPC control
IF Mute
Manual
Selection 0 = Automatic,
1 = Confirm,
2 = Manual
3 = Manual & Pwr Loss
Manual requires manual
Carrier enable after Mod
output change. Option 3
forces Cxr off after power fail.
IF Impedance
75 Ohm
Selection
0 = 50Ω, 1 = 75Ω
Transmit IF impedance.
- PSM-500/PSM-500L/500LT 1
- Table of Contents 3
- Safety Notice 3
- EMC Notice 9
- About This Manual 10
- 1.0 Introduction 11
- 1.1 Modem Capabilities 12
- 1.1.1 Modem IF Variations 12
- Page 1-3 13
- 1.1.3 Applications 14
- Page 1-5 15
- Page 1-6 16
- Page 1-7 17
- 1.2.1 Modulator 18
- 1.2.2 Demodulator 19
- Page 1-10 20
- Transmit Clock Sources 21
- Receive Clock Sources 21
- 1.2.4 Control Processor 22
- Page 1-13 23
- Page 1-14 24
- Page 1-15 25
- Page 1-16 26
- Page 1-17 27
- Page 1-18 28
- Page 1-19 29
- Page 1-20 30
- Compatibility 30
- Page 1-21 31
- Chapter 2 - Installation 33
- 2.3 Modem Connections 34
- L-Band IF Modem 37
- 2.3.3 Alarm Connection 40
- Station IF 42
- Equipment 42
- 2.4 Modem Checkout 44
- 2.5.1 Parameter Setup 45
- 2.7 Self-Test Mode 46
- 2.8 IF Loop-back Test Mode 46
- 2.9 Modem Configuration 47
- External Connector Area 57
- Rear Connector Plate 57
- M500 Series Main PCB 59
- Chapter 3 - Operation 61
- 3.1.2.2 Front Panel Keypad 62
- IF Frequency 63
- 70.125613MHz 63
- Data Bit Rate 65
- 256.000kbps 65
- Page 3-7 67
- LO Frequency 70
- Filter Mask 70
- Low Level Alm 70
- Page 3-11 71
- Page 3-13 73
- Page 3-15 75
- Page 3-17 77
- Page 3-19 79
- Page 3-21 81
- Page 3-23 83
- Page 3-25 85
- 3.3 Terminal Mode Control 87
- Page 3-29 89
- 3.5 Modem Checkout 90
- 3.5.1 Power-Up 91
- 3.6.1 L-Band BUC Control 92
- 3.6.2 L-Band LNB Control 92
- 3.7.1 VSAT Mode 92
- 3.7.2 SCPC Mode 93
- AUPC Control 94
- Page 3-35 95
- Page 3-37 97
- Page 3-39 99
- 3.16 Burst Mode Operation 101
- Chapter 4 - Maintenance 103
- Page 4-3 105
- 4.2 Troubleshooting 106
- at the front 107
- 4.2.3 Built-in Lamp Test 109
- Page 4-9 111
- Page 4-11 113
- Page 4-13 115
- OR How Do I? 117
- Why Doesn’t It? 117
- and Where Is? 117
- Page 4-17 119
- A.3 Why does It do that? 120
- B. Front Panel Control 120
- C. Remote Control 121
- D. Data Interface 122
- E. Manual 123
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