Thurlby Thandar Instruments TTI TF960 Counter
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6GHz Universal Counter
is a portable, battery-operated, universal Counter
with a large 0.5" 10-digit liquid crystal display (LCD). The
frequency range is from below 0.001Hz to over 6GHz and
measurement functions include frequency, period, ratio,
pulse width and count.
The instrument uses a high quality temperature compensated
internal frequency reference which has a low aging rate and
is stable to within ±1ppm over the full temperature range.
Its short warm-up time allows accurate measurements to be
made even under portable battery powered conditions.
Input A has configurable coupling (AC or DC), input
impedance (1MΩ or 50Ω), attenuation (1:1 or 5:1), threshold
(fully variable) and active edge and can be used for
frequencies in the range 0.001Hz to over 125MHz. Input B is
a nominal 50Ω input for frequencies in the range 80MHz to
3GHz. Input C is a nominal 50Ω input with an N-type
connector for frequencies in the range 1GHz to over 6GHz. An
External Reference input is provided and changeover from the
internal timebase is automatic when an external reference
standard is connected.
For frequency, period and frequency ratio functions the
instrument uses a reciprocal counting technique to provide
high resolution at all frequencies. 8 significant digits of
answer are produced in a 1 second measurement time, 9 digits
in 10s and 10 digits in 100s with a granularity of less than
2 counts in the least significant digit.
Indicators show measurement input configuration & function,
measurement time & status, external reference connection,
low battery and the units of the measurement which may be
Hz, kHz, MHz, ns, us, ms or s.
The instrument has a USB Interface
which allows it to be
remotely controlled using serial communication via a
computer’s USB port. The remote commands of predecessor
instruments, the TF830 and the TF930
are compatible with
The instrument operates from internal rechargeable NiMH
batteries which give typically 24 hours operating life. The
universal AC charger supplied will recharge the batteries in
less than 4 hours and can be used for continuous AC
operation. The instrument will also automatically be powered
from a standard USB port when connected (whether remote
control is in use or not) but this will not charge the
This instrument is fully compliant with EN61010-1 Safety and
EN61326 EMC standards.
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Electronic document, no scan, very well readable.
14 January 2017
Manual Operation 10
Remote Operation 17