Agilent Technologies ESG Uživatelský manuál stáhnout pdf (Strana 18)

Bit Error Rate (BER) analyzer

(Option UN7, ESG-DP and ESG-D series only)

Clock rate 100 Hz to 10 MHz

Supported data patterns PN9 and PN15

Resolution 10 digits (6 digits for BER (exp))

Minimum synchronization length

2 Mbps mode 9 bits (PN9), 15 bits (PN15)

10 Mbps mode 43 bits (PN9), 48 bits (PN15)

Bit sequence length 100 bits to 4.294 Gbits after

synchronization

Features

2 Mbps mode 10 Mbps mode

Real-time display

Bit count X X

Error-bit-count X

Bit Error Rate X

Pass/fail indication X X

Valid data and clock detection X X

Automatic re-synchronization X

Special pattern ignore X

Base station Bit Error Rate

Test (BERT) extension for Option UN7

(BER analyzer)

(Option 300, requires Options UN8, UN7, and UNA;

E4406A VSA-series transmitter tester with Options BAH and

300. ESG-D series only)

GSM base station BERT with the ESG-D RF signal

generator and E4406A VSA-series

transmitter tester.

Test technique RF loopback

Supported systems GSM 900 (P-GSM)

DCS 1800

PCS 1900

E-GSM (Extended)

GSM output data

Timeslot under test

Timeslots tested 0 to 7

Frequency channels Any single ARFCN

(no frequency hopping)

Channel content Full-rate speech (FS)

Encryption None

Data PN9, PN15 coded as per ETSI GSM,

Rec. 05.03 version 3.6.1 (Oct 94)

Frame structure 26-frame TCH multiframe structure as

per ETSI GSM, Rec. 05.01 version 6.1.1

(1998-07)

Minimum power level –136 dBm (ESG minimum)

Maximum power level +13 dBm (ESG maximum)

Power level accuracy ±0.5 dB (23 ± 5oC)

Adjacent timeslots

Data PN9, PN15 coded as per ETSI GSM,

Rec. 05.03 version 3.6.1 (Oct 94)

Frame structure 26-frame TCH multiframe structure as

per ETSI GSM, Rec. 05.01 version 6.1.1

(1998-07)

Relative power level 0 to ±130 dB relative to timeslot

under test (Limited only by output

power

range of the ESG. Based on

Option UNA specification.)

Measurements

Results Class Ib bit-error ratio (RBER for

TCH/FS)

Class II bit-error ratio (RBER for

TCH/FS)

Frame erasure ratio (FER)

Downlink error frame count

Class Ib bit-error count

Class II bit-error count

Erased frame count

Total frame count

Maximum RBER 100%

Maximum FER 100%

Measurement triggers Immediate, trigger key, bus, external

Measurement modes

Static reference

sensitivity test (BER%) RBER at user-specified power

level measured (This is the complete

conformance test as defined in

pri-ETS 300 609-1 (GSM 11.21) version

4.12.0 (Dec 98), section 7.3.4

BER sensitivity search Automatically finds the input level

(sensitivity) that causes a user speci-

fied RBER (normally 2%) for Class II

bits

Measurement indication Pass/fail

Maximum frame count 6,000,000 speech frames

Threshold Termination of measurement when

error

count exceeds user specified

threshold

BCH sync BCH signal from the BTS is used to

determine TCH frame and multiframe

location

1. Perch power level is 3 dB below DPCH power.

2. DPCCH power level is 6 dB below DPDCH power.

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