Specifications

PSM-500/500L/500LT SCPC Satellite Modem Installation
PSM-500/500L/500LT - Rev. 0.91 Page 2-3
The Modulator 70 MHz IF Output at female BNC J7
50 – 90 MHz
Programmable +5 to –35 dBm output at 75Ω
Programmable +3 to –35 dBm output at 50Ω.
The L-Band Modulator (PSM-500L) L-Band IF Output at female Type N J7
950 – 1750 MHz
Programmable +3 to –35 dBm output at 50Ω.
BUC Power Source (normally 24VDC @ <4A) to be output on this connector. Various
supplies are available and all are connected to the 5 pin DIN connector at J10.
Programmable 10 MHz Reference signal to be output on this connector.
⇒ CAUTION!: Extreme Care should be exercised when connecting test
equipment in the transmit line either directly to the modem output or within the
line to the BUC. The voltage present to power the BUC can cause severe
damage
to the input of test equipment like spectrum analyzers. A DC Block device is
highly recommended for test equipment connection.
⇒ CAUTION!: Extreme Care should be exercised when handling the transmit
cable as it is possible to have hazardous voltages on the transmit line. When
higher voltages are used to supply BUCs that require 48VDC the transmit line
can seriously
injure personnel.
To avoid injury or equipment damage unplug the L-Band modem
and BUC power supply whenever the transmit cable is
disconnected!
The L-Band Modulator (PSM-500L) Block Up Converter Power Supply at J10
12 to 56 Volts DC, up to 6 Amp capability.
Programmable enable and disable onto the transmit cable at J7
The BUC Power Status LED next to J7 shows the status as follows
Red – No voltage sensed on DIN input connector or power is input and the
enabled but the cable to the BUC is shorted.
Green – Power sensed and enabled (connected) to transmit cable
Off – Power sensed but disabled (disconnected) from transmit cable.
The Demodulator 70 MHz IF Input at female BNC J9, 50 – 90 MHz
–20 to –60 dBm input at 75 or 50Ω. (to –84 dBm at lower bit rates)
The L-Band Demodulator (/L) L-Band IF Input at female Type F J9
950 – 1900 MHz
–20 to –60 dBm input at 75Ω. (to –100 dBm at lower bit rates)
Programmable 0, 13VDC or 18VDC @ <500mA to be output on this connector
Programmable 10 MHz Reference signal to be output on this connector.
⇒ CAUTION: Extreme Care should be exercised when connecting test
equipment in the receive line to the LNB. The voltage present to power the LNB
can cause severe damage to the input of test equipment like spectrum analyzers.
A DC Block device is highly recommended for test equipment connection.
The Modem External Reference Input at female BNC J8
1, 5, 9 or 10 MHz input
+10 to –15 dBm input level at 50Ω (normally a sine wave).