Correct

鉴频

/ jiàn pín / 
Strokes

Example

As a Noun

frequency discrimination/demodulation

1
Jiànpínqì
鉴频器

(frequency) discriminator

2
Jiàn
鉴
pín
频
guǎn
管

discriminator tube

3
Jiàn
鉴
pín
频
diànlù
电路

frequency-discriminating circuit