FUNCTION AND RANGE HINTS AND COMMENTS
Reciprocal frequency measurement of the signal at In-
put-B.
Range:
70 to 1300 MHz (PM 9608B)
The cursor does not stop at FREQ B if no Input-B HF-
input is installed.
The counter divides the frequency on Input-A by a
constant, A
0
, that is stored in the counter in the follow-
ing way:
1) Connect a signal with the frequency to be stored
as A
0
to Input-A.
2) Select FREQ A.
3) Depress the DISPL HOLD key and hold it de-
pressed until the DISPL HOLD indicator is switched
off again. Now A
0
is stored.
4) Select FREQ A/A
0
.
5) Connect the frequency to be measured to Input-A.
If you select this function without storing A
0
,
Frequency A will be displayed.
This function is convenient when an oscillator is to be
tuned to the frequency of a reference oscillator. It is
much easier to adjust until the display shows
1.0000000 than 7.1223678.
The counter substracts a constant, A
0
, from the fre-
quency at Input-A. You can read about how to store
A
0
in the description for FREQ A/A
0
.
If you select this function without storing A0,
Frequency A will be displayed.
This function can e.g. be used in a radio to display
the received frequency; Set the intermediate
frequency as the constant A
0
. Select FREQ A-A
0
and
measure the frequency of the local oscillator, and the
display will show the received frequency.
The frequency on Input-A is multiplied by 60 and dis-
played as Revolutions Per Minute.
Range:
6 RPM to 720 000 000 RPM.
When you select SINGLE, the Frequency Counter
measures one period, the range is: 100 ns to 200
000 000 s (about 6 years and four months!).
When you select 0.2, 1, and 10 s Measuring-time, the
Frequency Counter divides the input frequency by 10
and measures the average period for the No. of cy-
cles in that time.
Range:
8 ns to 1 s.
Use SINGLE when the input frequency is low. This
shortens the measuring time considerably since one
cycle is measured instead of 10.
The Frequency Counter counts the total number of
pulses fed to Input-A. You start and stop the totalizing
with the TOTALIZE START/STOP key (RESET/LO-
CAL). If you keep this key depressed for more than
one second, the total sum will be reset.
Range:
0 to 1
*
10
15
pulses
k on the display indicates kilo-pulses (1000) and M in-
dicates Mega-pulses(1 000 000).
The Measuring-time indicator is switched off in TOT
A MAN.
OPERATING INSTRUCTIONS Page: 11
PM 6669 - OPERATORS MANUAL
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