1. Scope
1.1 Accordance
The specification is issued pursuant to paragraph 1 of Article 42 of the Telecommunications Acts.
1.2 Application Scope
1. POCSAG pager operating within the frequency band of 160MHz, and with encoded transmitting speed 1200bps.
2. POCSAG pager operating within the frequency band of 280MHz, and with encoded transmitting speed 1200bps.
3. FLEX or POCSAG pager operating within the frequency band of 284.5MHz~285.5MHz, and with encoded transmitting speed 6400bps.
1.3 Contents and Reference
The normative reference of the test items, conformance requirement, method of tests and relevant requirements for use in the specifications of a POCSAG or FLEX paging receiver (pager) in the public paging service are based on the ETSI TBR 7 ERM ERMES, Receiver Requirements, December 1999, FLEX Receiver Performance and Test Procedure, CNS 12813 Low Speed（1200bps） display pager, CNS 12814 1200bps Numerical-Display Pager, CNS 14435 Medium Speed（2400bps）display pager, and CNS 14436 High Speed（6250/6400bps）, etc.

2. Abbreviations
2.1 Abbreviation
The abbreviation of these requirement are as follows,

3. Required Test Items

4. Frequency Range
4.1 Test purpose
To verify that the pager operating frequency is 160MHz, 280MHz or from 284.5MHz to 285.5MHz.
4.2 Conformance requirement
The Applicant shall submit the Declaration of Conformity that the pager is able to receive the signal at the frequency of 160MHz, 280MHz or 284.5MHz~285.5MHz. The test center frequency is at 166.775MHz, 280.9375MHz, or 285.4375 MHz.
4.3 Method of measurement
The Applicant shall submit the Declaration of Conformity.
4.4 Test requirement
The Applicant shall submit the Declaration of Conformity.

5. Channel Spacing
5.1 Test purpose
To measure the allocated channel spacing for a pager is at 25kHz.
5.2 Conformance requirement
The Applicant shall submit the Declaration of Conformity for the channel spacing at 25kHz.
5.3 Method of measurement
The Applicant shall submit the Declaration of Conformity.
5.4 Test requirement
The Applicant shall submit the Declaration of Conformity.

6. Sensitivity
6.1 Test purpose
To measure that the minimum field strength of receiving signal of the best position shall be successfully at 8 times out of 10 pages.
6.2 Conformance requirement
Minimum field strength of receiving signal shall be less than 19dBμV/m for low speed (1200bps), 22dBμV/m for medium speed (2400bps), or 24dBμV/m for high speed (6400bps), and shall be successfully at 8 times out of 10 pages.
6.3 Method of measurement
The test shall be conducted in a shielded room without any interference. The test signal shall be transmitted from a vertical polarization antenna. The center of the antenna shall be at 3m above the ground plane. The pager shall be placed on the simulated man at 30m to the transmitting antenna and at 1.4m above the ground plane. To measure that the minimum field strength of receiving signal strength at XiμV/m of the best position shall be successfully at 8 times out of 10 pages by raising or lowering input power level of 1dB. The measurement shall be repeated and recorded the (Xi) with the directions of every 45 degree for the best position of sensitivity.
6.4 Test requirement
a. The test shall be conducted in a shielded room as Fig 1, and the test condition shall be as in Annex A.
b. The pager sensitivity measurement test site shall be on level ground with uniform electrical characteristic and be free from reflecting objects over as wide an area as possible to ensure that extraneous electromagnetic field does not affect the accuracy of the test results.
c. The test site for the pager sensitivity test shall be as follows,
Useful frequency range: 25MHz to 1GHz.
Nominal attenuation of 30m free space test site is 20dB to 46dB for 25MHz; 52dB to 78dB for 1GHz respectively.
Nominal attenuation of the 30m free space test site for a half-wave dipole is 26dB for 25MHz, 58dB for 1GHz respectively. The actual attenuation may vary due to ground reflections.

7. Adjacent Channel Selectivity
7.1 Test purpose
The adjacent channel selectivity is a measure of the capability of the pager to operate successfully above the threshold value, due to the presence of an unwanted modulated signal in the operating frequency of ±25KHz.
7.2 Conformance requirement
The adjacent channel selectivity is a measure of the capability of the pager to operate successfully above at least 40dB, due to the presence of an unwanted modulated signal in the operating frequency of ±25KHz.
7.3 Method of measurement
a. signal generator 1 and 2 are set as follows,
Signal generator 1:
Frequency range: Fc (Carrier frequency)
Modulation: FM EXT.DC
Deviation: ±4.5KHz for POCSAG
±4.8KHz for FLEX
Amplitude: the best sensitivity +3dB

Signal generator 2:
Frequency range: Fc (Carrier frequency)±25KHz
Modulation: 400Hz tone
Deviation: ±3KHz
Amplitude: lowest
b. initially, signal generator 2 shall be switch off. The amplitude of signal generator 1 shall be adjusted, as described in sub-clause 6.1 to record the measured output level for the best pager sensitivity.
c. as step b, add 3dB
d. signal generator 2 shall then be switched on (unwanted signal), and its frequency adjusted to the channel above that of wanted signal.
e. adjust the output level of the unwanted signal of signal generator 2 until the receiving signal is not obtained by each successful page.
f. the level of unwanted signal shall then be reduced until the receiving signal to be received successfully at 8 times out of 10 pages.
g. record the output level of signal generator 2
h. repeat step d to g, adjust it to the channel below that of wanted signal.
i. the ratio in dB of the output levels of signal generator 1 and 2, is that of adjacent selectivity. The output level of the upper or lower adjacent channels shall be recorded and to select the smaller level.
7.4 Test requirement

8. Spurious Response Immunity
8.1 Test purpose
Spurious response rejection is a measure of the capability of a pager to operate successfully above the threshold value, due to an unwanted modulated signal in the operating frequency of at least two channels bandwidth (±62.5KHz).
8.2 Conformance requirement
Spurious response rejection is a measure of the capability of a pager to operate successfully above at least 40dB, due to an unwanted modulated signal in the operating frequency of at least two channels bandwidth (±62.5KHz).
8.3 Method of measurement
a. signal generator 1 and 2 are set as follows,
Signal generator 1:
Frequency range: Fc (Carrier frequency)
Modulation: FM EXT.DC
Deviation: ±4.5KHz for POCSAG
±4.8KHz for FLEX
Amplitude: +3dB for the best sensitivity

Signal generator 2:
Frequency range: 30MHz~(Fc-62.5KHz) and (Fc+62.5KHz)~1GHz
Modulation: 400Hz tone
Deviation: ±3KHz
Amplitude: 0dBm
b. initially, signal generator 2 shall be switch off. The amplitude of signal generator 1 shall be adjusted, as described in sub-clause 6.1 to record the measured output level for the best pager sensitivity.
c. as step b, add 3dB
d. signal generator 2 shall then be switched on (unwanted signal), and its frequency adjusted to the slow scan mode for 30MHz~(Fc-62.5KHz) and (Fc+62.5KHz)~1GHz.
e. the wanted signal shall then be continuously repeated until the successful response is not observed. The input level of the unwanted signal shall be reduced for the successful response received at 8 times out of 10 pages. The level of the input signal shall then be recorded.
f. the spurious response immunity for receiving signal at the frequency is the ratio in dB of the unwanted signal level recorded in step e with the level of the wanted signal in step c.
8.4 Test requirement

9. Intermodulation Response Immunity
9.1 Test purpose
To measure that the capability of a pager receives a wanted signal at the normal frequency for a successfully page response. It caused by two equal level unwanted signals with a specific frequency relationship to the wanted signal at nominal operating frequency, one of which is modulated with normal coded signal having at specific intermodulation frequency.
9.2 Conformance requirement
The limit of the intermodulation response immunity shall be no less than 42dB.
9.3 Method of measurement
a. signal generator 1, 2, and 3 are set as follows,
Signal generator 1:
Frequency range: Fc (Carrier frequency)
Modulation: FM EXT.DC
Deviation: ±4.5KHz for POCSAG
±4.8KHz for FLEX
Amplitude: +3dB for the best sensitivity

Signal generator 2:
Frequency range: Fc±50KHz
Modulation: No

Signal generator 3:
Frequency range: Fc±100KHz
Modulation: 400Hz tone
Deviation: ±3KHz
b. initially, signal generator 2 and 3 shall be switch off. The amplitude of signal generator 1 shall be adjusted, as described in sub-clause 6.1 to record the measured output level for the best pager sensitivity.
c. as step b, add 3dB
d. signal generator 2 shall then be switched on (unwanted signal), and its frequency adjusted the frequency to Fc+50KHz without modulation.
e. increase the output level of signal generator 3, and adjust the frequency to Fc+100KHz with modulated signal.
f. adjust the output level of the unwanted signals of signal generator 2 and 3 to the lowest and equal level until the receiving signal is not obtained by a successful page.
g. the level of unwanted signals of two signal generators shall then be reduced until the receiving signal to be received successfully at 8 times out of 10 pages.
h. the unwanted signal output level of two signal generators shall be adjusted for a successful response. The level of the output signal shall then be recorded.
i. the intermodulation response immunity for receiving signal at the frequency is the ratio in dB of the unwanted signal level recorded in step h with the level of the wanted signal in step c.
9.4 Test requirement