Safety 1st TR233 Specifications download pdf (Page 28)

(ii) Software RTB.

RTB phase shift: 180 degrees +/- 10 degrees, lagging.

RTB duration: between 80mSec to 150mSec.

CTCSS tone frequency dependent. See Table 2.1

RTB amplitude variation 0.5dB.

(across CTCSS tone set).

2.4.2.3 Decoder

(i) Tone-Set.

as per Encoder.

(ii) Bandwidth.

+/- 3.0% max.

(iii) Deviation Sensitivity.

Better than 6% of system deviation (for decode with full RF quieting).

(iv) Noise Immunity.

Less than 500mSec dropout per minute for l0dB sinad

(CTCSS tone deviation 10% of system and sinad signal of 60% deviation at

1kHz).

(v) False Decode Rate.

Less than 5 false decodes per minute (no carrier input).

(vi) Talkoff.

I nterfering tone deviation for loss of decode (CTCSS tone deviation 10% of

system).

Full quieting RF signal: 310Hz to 3kHz 90% of system deviation (for no

dropouts).

20dB sinad RF signal: 320Hz to 3kHz ; 90% of system deviation (for no

dropouts in one minute).

12dB sinad RF signal: 350Hz to 3kHz; 90% of system deviation (for no dropouts

in one minute).

(vii) Response Time; Less than 250mSec.

(With a full quieting signal of 67Hz at 10% of system

deviation; 67Hz gives the slowest times).

(viii) De-response time; Less than 250mSec.

2.4.2.4 Speech Rejection Filter

(i) Response.

300 Hz0 dB.

250 Hz<-36 dB.

Section 2 Page 8

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Safety 1st TR233 Specifications Page 28