User Manual 3162A/B
Maintenance and Performance Checks 5-16
PLL Characteristics
Accuracy:
±(2880/n [points] + 20 ns/Period [ns] x 360).
Equipment:
Counter, Pulse/Function Generator, Feedthrough Terminator, 3
each BNC Cables, 50 “T” Connector
1.
Configure the Model 3162B as follows:
Function:
User
Mode: PLL
Sample Clock: 500 MHz
Amplitude:
2 V
Trigger Level:
0 V
Remote Commands:
:RES
:FUNC:MODE USER
:PHAS:LOCK ON
:TRIG:LEV 0
:VOLT 2
:OUTP ON
2.
Make the following connections:
1. Connect function generator output to the input of the 50
Ω
“T”
Connector.
2. Connect one end of the 50
Ω
“T” connector to the 3162B TRIG IN and
the other end to the counter Channel A input.
3. Connect the 3162B OUT to the counter Channel B input.
3.
Using WaveCAD, or any other waveform generation program, load
segment 1 with a 360-point square waveform.
4.
Set counter to phase measurements. Terminate counter inputs by 50
Ω
.
5.
Set the 8021 to output a 2 V p-p, 500 kHz square waveform.
6.
Change 3162B phase offset using the command PHAS:ADJ and verify
counter phase readings as shown below:
Phase Offset
Counter Reading
0
°
0
°
, ±11.6
°
90
°
90
°
, ±11.6
°
180
°
180
°
, ±11.6
°
270
°
270
°
, ±11.6
°
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