Advertisement
Model 5328A
Operation
Table 3-3. Functions and Resolution Switch Settings
FUNCTION
RESOLUTION, N Switch
FREQ A, FREQ C
PERIOD A,T.1. A to B
Indicates frequency resolution in Hz.
Indicates the factor (N) by which time base is scaled.
Maximum resolution occurs with N=1.
Indicates number of time intervals or periods over which
the average measurement is made.
PERIOD AVG A,
T.l. AVG A to B
DVM
Indicates the integration time (per Table 3-2) for the
measurment.
Indicates the number of counts at the A input over which
the ratio measurement is made.
Resolution improves with
increasing N.
RATIO B/A, RATIO C/A,
DVM/At
Indicates scale factor.
In START, the frequency at A is
scaled by N. In START CLOCK, internal oscillator is scaled
by N.
Independent of RESOLUTION setting.
START, START CLOCK
EVENTS C, A to B;
DVM A to Bt
DVM/A
Indicates the number of counts at the A input over which
the ratio measurement is made.
(The DVM circuits are of
the V to F type with the factor 10 kHz/volt.)
Resolution
improves with increased N. Annunciator is not displayed
in units (V) but prefix (m, uw, n, etc.) is displayed.
t"Phantom" functions
3-63.
Input Channel Selection
3-64.
Two separate inputs are provided on the standard universal module. The A and B inputs
are identical in specification and identical controls are provided for each input to allow maximum
versatility and accuracy. The COM A-SEP switch, located between the two inputs, controls the
selection of input.
3-65.
In the SEP position, the A and B inputs and controls operate independently of each other
for applications in time interval, ratio, or other operations where the signals applied to the A and
B inputs are from different sources.
3-66.
In the COM A position, the input circuits are connected as described in the following
paragraphs.
The difference beteen the standard and Option 040 universal modules is shown.
3-67.
STANDARD
UNIVERSAL MODULE.
In the COM A position, the INPUT B connector is
disconnected and the A and B input amplifiers are connected together to the INPUT A connector
as shown in Figure 3-14.
As can be seen from the figure, the channel
B AC-DC switch and
attenuator control are disabled when the COM
A. The channel A AC-DC and attenuation
controls condition the input signal to both channel A and channel B input amplifiers. The
impedance remains 1 MQ (although input capacitance increases from 40 pF to approximately 65
pF) and the channel sensitivity, dynamic range, and damage levels remain unchanged.
3-21
Advertisement
