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MEASUREMENT FUNCTIONS
Frequency (Range A)
Frequency Range: 3Hz to 125MHz
Resolution: 10-7Hz to 100Hz
(see Note)
Frequency (Range B)
Frequency Range: 80MHz to 3000MHz
Resolution: 1Hz to 10kHz
(see Note)
Period (Range A only)
Period Range: 8ns to 330ms
Resolution: 10-7ns
to 1us (see Note)
Measurement Time
Selectable as 10s, 1s or 0.1s. (Note that
for the 0.1s setting the effective
measurement time is 0.3 seconds).
Resolution
The displayed resolution depends upon the
measurement time and the input frequency.
Eight digits (or nine using an overflow
indication) are displayed for a 10s
measurement time.
Seven or eight digits are displayed for a 1s
measurement time, and six or seven digits
for 0.1s
depending upon the input frequency. Usable
resolution may be further reduced by noise,
particularly at low frequencies.
Accuracy
Measurement accuracy is the sum of the
timebase accuracy and measurement resolution
plus one count.
TIMEBASE
Crystal Oscillator Frequency: 10MHz
Initial Oscillator Adjustment Error: ± 2ppm
(closed-case adjustable by user)
Oscillator Temperature Coefficient:
Typically less than ± 0.3ppm/°C 18°C to
28°C, ±10ppm –20°C to 70°C
Oscillator Ageing Rate: <± 5ppm/year
OPERATING FUNCTIONS
Press to measure
With the power switch off, pressing any of
the function select keys will power the
instrument up in the corresponding function.
The instrument will automatically switch off
15 seconds after the last
key press.
Hold
Pressing the Hold key will stop further
measurements being made and the current
measured value will remain in the display,
with the Hold indicator on, until the Hold
key is pressed again.
Noise filter
The Filter key controls a low pass filter,
with a cut-off frequency of about 50kHz, to
ensure stable readings at low frequencies.
Signal activity indicator
When no input signal is detected the Trig
indicator will be off, indicating that no
measurement is possible. The gate time
indicator flashes until the first
measurement interval is complete.
INPUT
SPECIFICATIONS
Input A
Input Impedance: 1MOhm//20pF
(AC coupled)
Frequency Range: 3Hz to 125MHz
Sensitivity: Sinewave - 15mVrms 10Hz-125MHz
Input B
Input Impedance: 50Ohm
(AC coupled)
Frequency Range: 80MHz to 3000MHz
Sensitivity: Sinewave - 15mVrms 80MHz-2GHz,
50mVrms to 3GHz
Maximum Input Voltage
Input A and Input B: 30Vdc; 30Vrms 50Hz/60Hz
reducing to 1Vrms
above 1MHz
Note that the inputs will not be damaged if
subjected to an accidental short-term
connection to a 50/60Hz line voltage not
exceeding 250V rms.
DISPLAY
No.
of Digits: 8 full digits plus overflow
indicator for 8.5 digits
Size of Digits: 11.5mm (0.45”)
Annunciators: 15 annunciators
POWER
REQUIREMENTS
Battery Type: 9V PP3 alkaline
Battery Life: Typically 20 hours
Low Batt. Indicator: ‘Bat’ shows in display
when approximately 10% of battery life
remains
GENERAL
Operating Range: +5°C to +40°C, 20% to 80%
RH
Storage Range: -20°C to +60°C
Environmental: Indoor use at altitudes up to
2000m Pollution Degree 2
Size: 81mm x 178mm x 30mm (W x L x D)
Weight: 190gms excluding battery
Electrical Safety: Complies with EN61010-1
EMC: Complies with EN61326 |
3 Hz to 3000 MHz in two
overlapping ranges
