8194B, 8195B, 8197B
Spectracom Corporation
GPS Ageless Master Oscillator Instruction Manual
3-14
3.3.5 Set Up Switches
The Set-Up Switches configure the RS-485 address, baud rate and termination.
3.3.5.1 RS-485
Address
The Address switches give each unit installed on an RS-485 bus a unique identity. The
address may range from 0 – 31, DIP-switches 1 through 5 enter the binary equivalent of
the selected address. Table 3-6 lists the RS-485 addresses and the corresponding
DIP-switch settings.
The RS-485 protocol includes address source and destination information.
RS-485
ADDRESS
DIP SWITCH
1 2 3 4 5
RS-485
ADDRESS
DIP SWITCH
1 2 3 4 5
0
0 0 0 0 0 16
0 0 0 0 1
1
1 0 0 0 0 17
1 0 0 0 1
2
0 1 0 0 0 18
0 1 0 0 1
3
1 1 0 0 0 19
1 1 0 0 1
4
0 0 1 0 0 20
0 0 1 0 1
5
1 0 1 0 0 21
1 0 1 0 1
6
0 1 1 0 0 22
0 1 1 0 1
7
1 1 1 0 0 23
1 1 1 0 1
8
0 0 0 1 0 24
0 0 0 1 1
9
1 0 0 1 0 25
1 0 0 1 1
10
0 1 0 1 0 26
0 1 0 1 1
11
1 1 0 1 0 27
1 1 0 1 1
12
0 0 1 1 0 28
0 0 1 1 1
13
1 0 1 1 0 29
1 0 1 1 1
14
0 1 1 1 0 30
0 1 1 1 1
15
1 1 1 1 0 31
1 1 1 1 1
1 = SWITCH ON, 0 = SWITCH OFF
Table 3-6 Address Selection
3.3.5.2
RS-485 Baud Rate
DIP-switch 6 is reserved for future implementation of 19200 baud operation of the RS-
485 COM port. To ensure proper operation, place this switch in the OFF position. This
configures the COM port for 9600 baud.
3.3.5.3 Spares
DIP Switches 7, 8, and 9 are reserved for test and future expansion. To ensure proper
operation, place these switches in the OFF position.
