2461Type C User Manual
Performance Verification and Adjustments 6-2
Racal Instruments
1998
Input 1 Sensitivity
Test
Set the UCT to its default state. Select 50
Ω
input impedance for
input 1, and select external frequency standard.
Equipment: Signal Generator
Configure UCT as follows:
*RST
returns unit to default state
INP1:IMP
50
selects
50
Ω
impedance
selects external frequency
standard
If the UCT is fitted with a TCXO or OCXO oscillator option,
connect the UCT internal reference output to the external signal
source 10MHz Input. Configure the external signal source to
accept the 10MHz reference from the UCT.
Connect the Function Generator to the UCT as shown in Figure
6-1.
Figure 6-1, Input 1 Low Frequency Sensitivity Test Configuration
Apply the frequencies, amplitudes and resolution settings given
in the following table to the UCT. Check that the UCT gives a
stable reading within the tolerances given, at less than the
signal levels given (example: a stable reading at 20mV instead
of the listed 25mV).
Command Syntax:
MEAS1:FREQ?
takes a frequency measurement
Table 6-1, Input 1 Sensitivity Low Frequency Test
GATE
IN
1
VT1
VT2
ARM
T2
IN
STD
OUT
IN
2
OSC
UCT
IN 3
SIGNAL GENERATOR
AF OUT
10MHz OUT
INPUT 1
EXTERNAL STANDARD INPUT
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