CT Systems Wavetek 2500 - Page 32

note that since the sensitivity of a cellular telephone is on the order
of -116 dBm (.35 uv>, adjusting the RF generator output level below this
value may cause the cellular telephone to lose the signal and disconnect.
This will show up as a "MOBILE DISCONNECTED" failure on the Model-2500.
The three RF LEVELS available are the "X-lOuv, X-luv, and X-.luv. If the
cellular telephone under test has the received audio available, the Sinad
may pe measured by connecting the cellular telephone audio signal to the
Model-2500 front panel "SINAD AUDIO IN" connector. If no connection is
made the Sinad reading will not be accurate.
When the receiver sensitivity test is complete, press the "DOWN ARROW"
key to proceed to the next selection in the manual test flow chart.
Terminate Call from Cell (Cleardown)
This operation will terminate the current call in progress. When all
manual operation tests are complete, press the "ENTER" key to transmit a
release order to the cellular telephone, and terminate the call in pro-
gress from the cell site. Pressing the "DOWN ARROW" key will not termi-
nate the call in progress, but will return to the DISPLAY MOBILE DATA
selection in the manual test flow chart.
3.3.8 ERROR MESSAGES
During a cellular telephone test, certain error messages may be displayed
to indicate a failure in the test procedure. After an error message is
displayed, press the "ENTER" key to resume operation and return to the
main CELLULAR TEST MENU. Error messages are listed in the following
table:
Message
FAILED INITIAL VC
INCORRECT DCC
LOST SAT
MOBILE DISCONNECTED
NO MOBILE CARRIER
NO MOBILE RESPONSE
2500-MANUAL
Meaning
Mobile failed the intial voice
channel designation.
Digital color code returned from
the mobile was incor - rect.
SAT frequency from mobile has dis-
appeared.
Mobile has signalled a disconnect
sequence depending on the test
sequence in use, this may not be an
error in the test.
Mobile carrier was not detected on
the current channel in use.
Mobile . station did not respond to
control channel instructions from
Model-2500.
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