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MT8850A / MT8852A Bluetooth Test Set Using the Script Menu
Carrier Drift Test (Single Payload Mode)
The carrier drift test performs a frequency drift measurement over the length of the packet
received. This test can be performed using either the loopback test control or the TX test
control. The default is to use the loopback test control.
In loopback mode with hopping off, the MT8850A/MT8852A sends a packet with a
10101010 and the EUT returns packet for measurement.
In TX mode with hopping on or off, the measurement process is the same as for loopback
except that the MT8850A/MT8852A does not send full DHX packets but just POLL
packets. The EUT has been configured by the MT8850A/MT8852A to respond to a POLL
with the appropriate DHX packet. The EUT must support TX mode part of the Test Mode
specification for this to work. The test time is much shorter when run using TX mode
compared with loopback, as the MT8850A/MT8852A does not have to send full packet
lengths. When the test is performed in TX test mode, EUT transmitter and receiver
frequencies must be the same. For this test, the TX and RX frequencies are the same. TX
mode complies with the Bluetooth RF Test Specification for a carrier frequency drift test.
1. Refer to the settings below to enable the carrier drift test in the test list.
Test control: TX or Loopback
Payload: 10101010
Packet type: Any
Hopping mode: On or Off
2. Choose “Carrier drift” from the Script menu.
3. Press the
key to select or deselect this test from the script routine.
4. If a test is selected, the box will be filled in. If not selected the box will be hollow.
5. Press the
[Setup] soft key to display the Carrier drift test limits screen.
6. Press the
[Defaults] soft key to restore the default values.
7. Choose the limit you want to change.
8. Press the key and enter the new limit using the keypad.
9. Press the
[Enter] soft key.
10. Press the
key to return to the Script menu.
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Testing in Single Payload Script Mode June 2003