---

• CCITT Rec. O.33 (11/1988) – AUTOMATIC EQUIPMENT FOR RAPIDLY MEASURING STEREOPHONIC PAIRS AND MONOPHONIC SOUND-PROGRAMME CIRCUITS, LINKS AND CONNECTIONS
• 1 General
• 2 Basic design
  • 2.1 Start/source/program identification
  • 2.2 Modes of operation
• 3 Design and construction
• 4 Parameters
  • 4.1 Received level (insertion gain)
  • 4.2 Frequency/attenuation distortion (frequency response)
  • 4.3 Distortion
  • 4.4 Signal-to-noise ratio
  • 4.5 Compandor linearity
  • 4.6 Expanded noise
• 5 Stereo parameters
  • 5.1 Interchannel difference in gain and phase
  • 5.2 Interchannel crosstalk and circuit transposition
• 6 Equipment characteristics - sending unit
• 7 Equipment characteristics 2 receiving unit
  • 7.1 Input impedance: > 20 kohms
  • 7.2 Minimum accuracy and range
• 8 Operating equipment
• ANNEX A (to Recommendation O.33) Measurement sequence for monophonic sound-programme circuits
• ANNEX B (to Recommendation O.33) Measurement sequence for stereophonic pairs of sound-programme circuits
• ANNEX C (to Recommendation O.33) Measurement sequence for medium band sound-programme circuits
• ANNEX D (to Recommendation O.33) Measurement sequence for narrow-band (telephone type) circuits
• ANNEX E (to Recommendation O.33) Measurement sequence for narrow-band (telephone-type) circuits used for sound-programme transmissions which ...
• ANNEX F (to Recommendation O.33) Measurement sequence for the CMTT three-level test signals (without station announcement) for the alignment of ...