Zeroing And Calibrating Using Ttl Inputs; Rmt I/O Port Ttl Inputs; Ttl Inputs Control Logic - Agilent Technologies E4418B User Manual

Power Meter Operation
Zeroing and Calibrating the Power Meter

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
2-12
Pin Number
1
2
3
4
5
6
7
8
Input 2
1 1
1 0
0 1
0 0
Connection
none
Ground
Upper Window TTL Output
Lower Window TTL Output
TTL Input 1
TTL Input 2
Ground
Ground
Operation
None
CAL
ZERO
CAL
Agilent E4418B User's Guide