RF test chamber
A system for testing radio frequency (RF) communications of a device capable of such communications is provided. The system includes a chamber for isolating the device from RF interference, an antenna that is suitable for RF communications with the device wherein the antenna is capable of communications over a range of frequencies, the antenna being located within the chamber, and a digital communication link for providing non-RF communications with the device.
1. A method of testing radio frequency (RF) communications of a device having a device antenna capable of the RF communications, the method comprising the steps of:
placing the device in a test chamber for an RF communication test including an open air test and a closed circuit test, the chamber including a chamber antenna; and
implementing the RF communication test, including:
setting a first attenuator for the open air test or a second attenuator for the closed circuit test, the first attenuator being connected to the chamber antenna for RF communications with the device antenna, the second attenuator being connectable to a wired communication link for the closed circuit test, the wired communication link being connectable to the antenna port of the device antenna;
connecting the device to a test network for controlling the RF communication test for the device; and
verifying a bit error rate as an indication of the RF performance of the device.
2. A method according to claim 1 , wherein the device is connectable to the test network through the wired communication link.
3. A method according to claim 1 , wherein the step of setting comprises:
setting the second attenuator for attenuating a RF signal level to and from the device.
4. A method according to claim 1 , further comprising the step of:
implementing pre-test set up procedure for the open air test, including:
verifying that the device is in a handshake with the test network.
5. A method according to claim 4 , wherein the step of implementing pre-test set up procedure comprises:
setting the first attenuator to a calibrated RF communication signal level; and
implementing a communication test with the test network.
6. A method according to claim 2 , further comprising the step of:
implementing pre-test set up procedure for the closed circuit test, including:
connecting the device to the closed circuit test RF communication link; and
verifying that the device is in a handshake with the test network.
7. A method according to claim 6 , wherein the step of implementing pre-test set up procedure comprises:
setting the second attenuator to a calibrated RF communication signal level; and
implementing a communication test with the test network.
8. A method according to claim 1 , wherein the step of setting comprises:
setting the first attenuator for attenuating a RF signal level to and from the device, the chamber antenna being capable of communications over a range of frequencies.
9. A method according to claim 1 , comprising:
verifying that the device is in the RF communication; and
verifying that the device is in a handshake with the test network.
10. A method according to claim 1 , comprising:
implementing pre-test set up procedure for the open air test or the closed circuit test.
11. A method according to claim 10 , wherein the step of implementing pre-test set up procedure comprises:
calibrating the first attenuator or the second attenuator for the open air test or the closed circuit test.
12. A method of testing radio frequency (RF) communications of a device having a device antenna capable of the RF communications, the method comprising the steps of:
connecting the device to a test network for controlling a RF communication test including an open air test and a closed circuit test in a test chamber; and
implementing pre-test set up procedure for the open air test or the closed circuit test, including:
calibrating a first attenuator for the open air test or a second attenuator for the closed circuit test, the first attenuator being connectable to the chamber antenna for the open air test, the second attenuator being connectable to the device antenna via a closed circuit RF communication link for the closed circuit test;
implementing a communication test with the test network; and
verifying a bit error rate as an indication of the RF performance of the device.
13. A method according to claim 12 , comprising:
verifying that the device is in the RF communication; and
verifying that the device is in a handshake with the test network.
14. A method according to claim 12 , wherein the step of implementing pre-test set up procedure comprises:
connecting the device to the closed circuit RF communication link; and
verifying that the device is in a handshake with the test network.
15. A method according to claim 12 , comprising:
in the open air test or the closed circuit test, setting the first attenuator or the second attenuator to a calibrated RF communication signal level.
16. A method according to claim 12 , comprising:
placing the device in a test chamber for an RF communication test including the open air test, the closed circuit test and the pre-test set up procedure.