Subject to change without notice
17
Totalize (manual / external gated)
Range:
DC to 20 MHz
Min. pulse duration:
25 ns
LSD:
±1 count
Resolution:
LSD
Ext. gate error:
100 ns (in manual mode only)
Time interval (averaged)
LSD:
100 ns to 10 ps
Resolution:
1 or 2 LSD
Offset
Range:
covers the entire measurement
range
Gate time
(Gate time cannot be less than 1 period.)
Range:
100 ms – 10 s in 3 steps
External gate time:
min. 150 μs
Timebase
Frequency:
10 MHz clock
10 MHz crystal
Accuracy (between 10°C and 40° C):
±5 x 10
-7
Aging:
±3 ppm/15 years
General information
Display:
8-digit 7-segment LED display with
7.65mm digit height, sign and
exponent
Power consumption:
approx. 7 Watt
Operating temperature:
+5°C . . . +40°C
Storage temperature:
–20°C . . . +70°C
Max. relative humidity:
5% ... 80% (without condensation)
Dimensions (W x H x D):
135 x 68 x 228mm
Weight:
approx. 0.6 kg
Values without tolerances are meant to be guidelines and
represent characteristics of an average instrument.
Measurement functions
Frequency A/C, Period A; Totalize A;
Pulse width
(averaged); Totalize A during ext. gate
Input characteristics (Input A)
Frequency range:
0 – 150 MHz:
DC-coupled
10 Hz – 150 MHz:
AC-coupled
Sensitivity: (normal triggering)
DC – 80 MHz:
20 mV
rms
(sine wave)
80 mV (pulse)
80 MHz – 150 MHz:
60 mV
rms
(sine wave)
20 Hz-80MHz (auto trig.)
50 mV
rms
(sine wave)
Minimum pulse width:
5ns
Input noise:
100 μV (typ.)
Coupling:
AC or DC (switchable)
Input impedance:
1 MΩ II 40 pF
Attenuator:
x 1, x 20 (switchable)
Max. input voltage:
0 to 440 Hz:
400 V (DC + AC
peak
)
1 MHz:
decreasing to 8 V
rms
Input characteristics (Input C)
Frequency range:
100 MHz – 1.6 GHz
Sensitivity:
to 1.3 GHz:
30 mV (typ. 20 mV)
to 1.6 GHz:
100 mV (typ. 80 mV)
Input impedance:
50Ω nominal
Coupling:
AC
Max. input voltage:
5 V (DC + AC
peak
)
Input characteristics (external gate)
Input impedance:
4.7 kΩ
Max. input voltage:
±30 V
High/low level:
› 2 V/‹ 0.5 V
Min. pulse duration:
50 ns
Min. effective gate time:
150 μs
Frequency measurement (Input A)
LSD:
(2.5x10
-7
s x freq.)/measurement
time
Resolution:
±1 or 2 LSD
Period duration measurement
Range:
10000 sec to 66.6 ns
LSD:
(2.5 x 10
-7
s x period)/measurement
time
Resolution:
±1 or 2 LSD
S p e c i f i c a t i o n s
1.6 GHZ Universal Counter
SPECIFICATIONS
Valid at 23 degrees C after a 30 minute warm-up period
Included in delivery:
Universal Counter HM8021-4, Operator’s
Manual
Optional accessories:
HZ20 Adapter, BNC to 4mm banana
HZ24 Attenuators 50 Ω (3/6/10/20dB)
HZ33 Test Cable 50 Ω (BNC-BNC)0,5m
HZ34 Test Cable 50 Ω (BNC-BNC)1,0m
