Fluke ScopeMeter 19 B Series, Service Manual

Page: 43 / 86

Performance Verification
4.6 Scope Input A&B Tests
4
4-19
4.6.10 Input A AC Voltage Accuracy (HF) & Bandwidth Test
Proceed as follows to test the Input A high frequency automatic scope ac voltage
measurement accuracy, and the bandwidth:
1.
Connect the test tool to the 5500A as for the previous test (see Figure 4-5).
2. Select the following test tool setup:
•
Recall the created SETUP 1 (see section 4.4.3): press ,
RECALL
,
select
SETUP 1
, press
RECALL SETUP
.
•
Press , then press
READING 1
, and select
on A | V ac
.
•
Press to select autoranging (
AUTO
in upper right LCD edge)
•
Using and change the sensitivity range to select manual sensitivity
ranging, and lock the Input A sensitivity range on 500 mV/div. (
AUTO
in upper
right LCD edge disappears)
3. Set the 5500A to source a sine wave, to the first test point in Table 4-9.
4. Observe the Input A reading and check to see if it is within the range shown under
the appropriate column.
5. Continue through the test points.
6. When you are finished, set the 5500A to Standby.
Table 4-9. HF AC Voltage Verification Points
UUT 5500A SC... MODE levsin UUT
Model Voltage Frequency Reading A
all 2.545 Vpp 1 MHz 835 mV to 965 mV
all 2.545 Vpp 25 MHz 790 mV to 1.010 V
192B-C 2.545 Vpp 60 MHz >630 mV
196B-C, 215C 2.545 Vpp 100 MHz >630 mV
199B-C, 225C 2.545 Vpp 200 MHz >630 mV