The 6960B is a microprocessor controlled RF power meter
which combines high accuracy with fast, easy, flexible
operation and simple calibration and maintenance.
With the IFR 6910, 6920 and 6930 series of power sensors,
the 6960B can be used to measure powers from +35 dBm (3 W)
down to -70 dBm (0.1 nW) over a wide range of frequencies.
• The instrumentation error of the 6960B is no more than
0.5% in Watts mode or
0.02 dB in dB mode.
• The AUTOZERO function automatically zeros each of the
instrument’s five ranges and stores the data so that zero
carry-over error is less than 0.03%.
• The AUTOCAL key automatically calibrates the instrument to
an internal 50 MHz, 1 mW power reference. Calibration factor
data supplied with each sensor ensures that highest accuracy
is maintained across the whole of the sensor’s frequency range.
• Power sensors are provided with individual linearity
factor data. When entered into the 6060B, errors from this
source are reduced to less than ±0.5% for full- scale on
Speed and ease of use
• Typical response time is 250 ms for manual operation, with
fastest response of 25 ms when using the optional GPIB
interface. Response time and resolution can be automatically
optimized for each range.
• In normal operation the instrument will ‘auto-range’. Any
range may be ‘held’, however, to facilitate ‘peaking’
• A ‘max-hold’ function allows only the maximum measured
power value to be displayed.
• Manual control is through a calculator-type keypad, which
allows rapid selection of instrument settings and entry of data.
• The main display is a large four-digit LCD with a variety
of annunciators (see Fig. 1-1). An additional analogue meter
gives a display relative to the top of the current range.
Ten non-volatile memories, which can each store complete
instrument settings for up to 10 years, further reduce test
time and operator effort. The powerdown settings can be
automatically recalled at power-up if required.
• Measurements can be displayed in either logarithmic (dBm)
or linear (nW, μΥ, mW, W, kW) units.
• Offsets can be entered using the dB REL key to allow for
attenuation or amplification of power, or to measure drift.
• For pulse systems, direct readings of peak pulse power can
be made by entering the appropriate duty cycle.
• The automatic setting of response time/resolution can be
overridden to increase resolution, giving maximum displayed
resolution of 0.001 dB.
• With the optional interface fitted (Option 001), the 6960B
is fully programmable via the General Purpose Interface Bus
(GPIB). Service requests (SRQs) are used to signal to the
controller that the 6960B requires service, thus avoiding
unnecessary delays in bus operation which may occur with a
structured reading sequence.
• An optional external DC supply input is available. Any
voltage within the range 11 to 32 V can be accepted, such as
from a vehicle DC supply.