Zeroing And Calibrating Using Ttl Inputs; Rmt I/O Port Ttl Inputs; Ttl Inputs Control Logic - HP E4419B User Manual

Zeroing and Calibrating Using TTL Inputs

You can use the TTL inputs on the rear panel Rmt I/O port to initiate zero
and calibration cycles on the power meter. The connector is an RJ-45
series shielded modular jack with the TTL input pins connected as shown
in Figure 2-3.
Figure 2-3: Rmt I/O Port TTL Inputs
1 2 3 4 5 6 7 8
The TTL inputs are active low and control the zero and calibration
functions as shown in Table 2-2
Table 2-2: TTL Inputs Control Logic
Input 1
1
1
0
0
HP E4419B User's Guide
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Zeroing and Calibrating the Power Meter
Pin Number
1 none
2 Ground
3 Upper Window TTL Output
4 Lower Window TTL Output
5 TTL Input 1
6 TTL Input 2
7 Ground
8 Ground
Input 2 Operation
1 None
0 CAL A
1 ZERO BOTH
0 CAL B
Power Meter Operation
Connection
2-13