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2.1.2. Generator section
Sweep:
Generator:
, . . . - - - - - - - Sweep
r -
Generator--,
Lin
.
Log.
Rate
Count
·
Limits Cross·overs
Level Frequency
Total· Elapsed
(press 2
s
to Calc.}
--~-
Lower
-----
- - -
.
I
Upper
- - - - - -
- -
· - -
Freq. 1
I
I
I
Freq.
8
~--
' - -
~--
Decimals
0
1
2
3
,...----Digital Interface---..,
Output
Input SRQ/Addr.
r -
Front Panel Set-up-,
No.
Parameter
- - - - - - - -
•
_ _ _
~~
r - -
Remote
Field Entry
Enable
Disable
Fig. 2.3. Generator keys and display
First
Next
"Rate": Selects the frequency sweep rate. Press the key to switch be-
tween "Lin." and "Log." sweep rates.
"Count Total· Elapsed": Selects the number of frequency sweeps re-
quired for the test programme and simultaneously displays the number
of sweeps which have elapsed. The range for the total number of
sweeps is from 1 (plus the number of elapsed sweeps) to 9999, or the
test can be continuous (by setting a value of 10 000, or more). The
elapsed number of sweeps is reset when the total number of sweeps is
changed using the keyboard. It cannot be changed by using the
thumbwheel.
"Limits": Selects the lower- and upper-frequency sweep limits. These
are selectable in the range from 1 Hz to 10kHz with a minimum sweep
range of 0,3 Hz. Press the key to switch between the "Lower" and
"Upper" limit.
"Cross-overs": Selects the vibration meter cross-over frequencies. By
consecutively pressing the key, each cross-over frequency is set in
turn. The number of cross-overs (0 to
8)
is determined by the number
of vibration levels used in the test (refer to section 2.1.4). The fre-
quency range for the cross-overs is from 1,1 Hz to 9999,6 Hz. The
smooth cross-overs can be calculated and set by pressing the key for
approximately 2 seconds.
"Level": When in stand-by mode, it selects the programmed level.
When in operate mode, it displays the actual generator output level
(controlled manually or by the compressor). The range is from -1 00 to
0 dB relative to the maximum output capability.
11
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