Philips PM 6611 - Page 8

Multiple period A
Range
Frequency counted
Number of averagings
Time resolution
Accuracy
Count A
Range
Mode
Pulse pair resolution
Frequency ratio A/C or B/C
Range
Multiplier
Accuracy
Check
Auxiliary functions
Reset
Start/Stop
Display time
Stand by
Memory
B. INPUT CHARACTERISTICS
Input A
Range
Sensitivity
Impedance
Coupling
Attenuation
Trigger mode (level)
Safe overload
Attenuation x1
Attenuation x 20
Sine wave: 10 Hz—10 MHz
pulses: 1 Hz—10 MHz
10 MHz
N= 102 and 104
100 ns
N
+ 1 count + trigger error/N* + time base error
1 to 999999999
Accumulates pulses during manual start — stop interval
12 ns
fa : 10 Hz—80 MHz (All models)
5— 250 MHz, PM 6613
fs : 450— 520 MHz, PM 6614
50—1000 MHz, PM 6615
fc : 1 kHz—10 MHz (All models)
N= 102 and 104
+ 1 count + trigger error* of fo/N
10 MHz internally applied to channel A
Any measuring function may be selected
Pushing “RESET” resets the counter.
Releasing “RESET” starts new measurement
In function “COUNT A” the gate time is manually controlled by push-button
“START/STOP”. The memory is automatically switched off.
Continuously
variable
0.2—5
s
and
infinite
if
display
time
knob
is
pulled
The
switch
is
combined
with
display
time
control.
Position
“STAND
BY”
keeps
an
oven
oscillator
heated.
Switchable by push-button “MEMORY”
10 Hz—80 MHz full range, 10 Hz—100 kHz when low-pass filter is selected
by push-button “< 100 kHz”
Sine wave: 10 mV, 6 dB down at 10 Hz
pulses: 30 mV,.pfor pulse width 2 6 ns and rise time < 1 ms
1 MQ//25 pF
AC
X1,
x20
and
continuously
variable
Pos.pulse
(SL)
and
neg.pulse
(+f)
on
leading
edge
and
zero
crossing
(~)
max.
250
V
DC
or
230
Vin,
<
440
Hz
>
440
Hz
:
falling
to
12
Vims
at
>
1
MHz
max. 250 V DC or 230 V
rms
*
Trigger
error
is
+
3x
103
for
signals
with
signal
to
noise
ratio
of
=
40
dB.