Spectracom SecureSync User Reference Manual page 319

5.2.3.2 Model 1204-03, 1PPS/Freq Input (RS-485): General Specifications
Figure 5-9:
Pin assignment, RS-485 connector
Pin No.
1
2
3
4
5
6
7
8
9
10
Table 5-5:
5.2.3.3 Models 1204-01,-03: Input/Output Specifications
FREQ Input Specifications
CHAPTER •
5 SecureSync User Reference Guide Rev. 18
Inputs/Outputs : (1) 1PPS Input, (1) Freq Input (1) 1PPS Output. All input and output sig-
nals are RS-485 compatible.
Signal Type And Connector : Balanced RS-485 (3.8 mm terminal block)
Maximum Number of Cards : 6
Ordering Information : 1204-03: 1PPS/Freq input (RS-485 levels) module
Model 1204-03 option card rear plate
Signal
GND Ground
FREQIN_RS485+ RS-485 Frequency Input +
FREQIN_RS485- RS-485 Frequency Input –
GND Ground
PPSIN_RS485+ RS-485 1PPS Input +
PPSIN_RS485- RS-485 1PPS Input –
GND Ground
PPSOUT_RS485+ RS-485 1PPS Output +
PPSOUT_RS485- RS-485 1PPS Output –
GND Ground
Model 1204-03 1PPS/Freq Input: Connector pin assignment
Signal Type And Connector : Sine wave (BNC)
Detected Level : +13 dBm to -6dBm
5.2 Time and Frequency Option Cards
Function
303