Chapter 6 – Specifications
BB1122–11
6–3
2238 Mediator
User Manual
Measurement Sequence:
Manual control, or pre-set measurement time in
the range 30s to 99h, 59 m, 59 s with automatic
storage of measurement. Up to 99 measurements
can be specified for a Measurement Sequence
Auto Start:
The Mediator supports four Auto Starts which al-
low set-up of measurement start times up to a
month in advance. Auto Starts can also control
Measurement Sequences
Statistics
Up to seven L
N
values of your own choice can be
displayed.
Level and cumulative distributions with class width
of 0.5dB are saved with the measurement. The
statistics parameters can be printed or transferred
to a PC.
Aux 1 Output:
Connector: 2-pin LEMO. Can be used as an AC
output or a DC input for an external signal
AC Output:
Output Signal: Range-adjusted AC output, L-
weighted or with the frequency weighting selected
on the RMS detector. Short-circuit protected
Output: 1VRMS corresponding to full-scale indi-
cation
Max. Load:
10k
Ω
||1 nF
Output Impedance:
Typically 100
Ω
DC Input:
Voltage Range: 0 to 4 V
Resolution: 5mV (800 steps)
Aux 2 Output:
Connector: 2-pin LEMO. Can be used as a DC
output, a DC input for an external signal, a trigger
input or a trigger output.
DC Output:
Output Signal: DC version of signal on RMS de-
tector 1 (Fast, Inst). Delayed 0.8s. Short-circuit
protected
Output: 0 to 4.0V DC, (50mV/dB)
Update Rate: 160 times per second
Max. Load:
10k
Ω
||1 nF
Output Impedance:
Typically 100
Ω
DC Input:
Voltage Range: 0 to 4 V
Resolution: 5mV (800 steps)
Trigger Input:
Voltage Range: 0 to 4 V
Trigger Level: 2 V
Trigger Output:
Trigger Output: Pause: 0V, Measuring: 4 V
L
AFTm5
–L
Aeq
–
Overload% –
Underrange% –
Elapsed Time –
Start Time –
Start Date –
Time –
Instantaneous (display only)
L
XYinst
L
Vpk
L
XYp
–
Note 1: When both detectors are set to RMS, it
is not possible to select the same frequency
weighting for the two detectors.
Note 2: Time weightings F, S and I are
available simultaneously.
Note 3: If the Aux1 or Aux 2 socket is used for
input, the signal(s) can be displayed and stored.
Note 4: Values for statistics are sampled 40
times a second and are derived from the signal
on Detector 1 with a pre-selected time
weighting (F, S or I). The class width is 0.5 dB.
Seven percentiles (L
XYN,T
) are available during
measurement at user-selectable levels
(1%– 99%). A complete level distribution is
stored.
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