Biamp Cambridge Qt 300, Installation And Operation Manual

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If the RTC is to be used, it should be set prior to adjusting operating levels. The RTC is set using the pull-down
menus under “Administration: Date and Time”. You MUST set the day-of-the-week (e.g. Sun, Mon, Tues, etc.),
the date, and the time. The RTC will only be used if the control module has been unable to access an external
time server since it was powered on. This may be because the control module is not on a network or because
the corporate network’s firewall prevents access to the Internet based servers.
The source for the control module’s time stamp is listed next to the time stamp as either SNTP or RTC.
If the date is wrong following a power failure, and the system is relying on the internal RTC and not a network-
based time server, it is likely that the RTC’s battery is depleted. Replace the battery (see Battery Replacement,
page 14). Reassemble the control module and then plug it back into the wall outlet. Reset the RTC, either
manually or by connecting the controller to the LAN via SNTP.
Setting Equalizers and Emitter Fault Detection
A special, second-level login password is required to gain access to the Emitter Network Fault Detector (ENFD)
Screens; for control modules running firmware 6.0.0 and higher, it is “prosecret”. For control modules running
firmware prior to 6.0.0, please contact Cambridge Sound Management to obtain the special password(s) for
your module(s). You will need to provide the Mac Address of each control module. See the Administration
Section / Networking and Security block for the MAC Address, or it can be seen on the front panel.
Below are the screens for emitter fault detection and equalizer settings when logged in with the second-level
password.
Equalizer Update
After logging in with the second-level password, the operations sections will have a block that includes the
equalizer settings. The Masking and Audio equalizers are configured by the factory and should not need to
be modified in most installations. However, if desired, the equalizers may be used to adjust the system to a
different masking, paging, or music spectrum.
You may specify the gain for a tap in its corresponding box. All values are measured in dB and the range is
+/- 12 dB, in whole number increments. To specify a negative gain, precede the number by a minus sign (for
example, -2). Once you have specified all of the taps of interest, press each related Submit button. The values
will be changed and saved, and the equalizer will redraw to provide a visual representation of your settings.
When an equalizer’s settings are modified, the control module calculates and reports the impact the new
settings have on speech privacy. The report is shown in the Masking Equalizer control box and is stated
in terms of change to the Privacy Index. A change must be at least 1% for it to display. The calculation is
performed as specified in “ASTM International; Designation: E1130-02, Standard Test Method for Objective
Measurement of Speech Privacy in Open Offices Using Articulation Index”.
!
WARNING: MANUALLY CHANGING THE RTC’S TIME/DATE VIA THE “ADMINISTRATION: DATE
AND TIME” WINDOW SHOULD NOT BE ATTEMPTED BETWEEN THE HOURS OF 12:00 AM AND
2:00 AM ON DST TRANSITION DAYS (TWO PER YEAR). DOING SO COULD RESULT IN A MISSED
“SPRING AHEAD” OR “FALL BEHIND” EVENT. SET THE DATE AND TIME BEFORE MIDNIGHT ON A
DST TRANSITION DAY OR AFTER 2:00 AM ON A DST TRANSITION DAY.