32 Chapter 2
Quick Start: Learning How to Make Measurements
The HP 8753E - Front Panel
8. ACTIVE CHANNEL keys. The analyzer has two independent display channels.
These keys allow you to select the active channel. Then any function you enter
applies to this active channel.
9. The ENTRY block. This block includes the knob, the step
⇑⇓ keys, and the
number pad. These allow you to enter numerical data and control the markers.
You can use the numeric keypad to select digits, decimal points, and a minus sign
for numerical entries. You must also select a units terminator to complete value
inputs.
10. INSTRUMENT STATE function block. These keys allow you to control
channel-independent system functions such as the following:
■ copying, save/recall, and HP-IB controller mode
■ limit testing
■ external source mode
■ tuned receiver mode
■ frequency offset mode
■ test sequence function
■ harmonic measurements (Option 002)
■ time domain transform (Option 010)
HP-IB STATUS indicators are also included in this block.
11.
Preset key. This key returns the instrument to either a known factory preset state,
or a user preset state that can be defined. Refer to the "Preset State and Memory
Allocation" chapter in the HP 8753E Network Analyzer User's Guide for a
complete listing of the instrument preset condition.
12. PROBE POWER connectors. These connectors (fused inside the instrument)
supply power to an active probe for in-circuit measurements of ac circuits.
13. R CHANNEL connectors. These connectors allow you to apply an input signal
to the analyzer's R channel, for frequency offset mode.
14. PORT 1 and PORT 2. These ports output a signal from the source and receive
input signals from a device under test. PORT 1 allows you to measure S
12
and
S
11
. PORT 2 allows you to measure S
21
and S
22
.
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