Modulator/Demodulator Symbol

first: sorry for my bad english!

i try to find a universal symbol for a modulator and a symbol for a demodulator.

i found at
Alternating current schematic symbols - Electronic Symbols Elektropage.com
that symbol for a demodulator:

but i guess this is not universal. i guess this is for a "Diode-Type Ring Demodulator".

can anyone help me?

thank you!

The Diode Ring Modulator has the same symbol as the Diode Ring Demodulator.

yes, but i'm looking for a UNIVERSAL (maybe this is the wrong word) symbol. a symbol which stands for any type of modulator/demodultor. includig AM, FM, FM, QPSK, ASK, DSM...

I am afraid there is not such a symbol for a modulator.
Sometimes block diagrams use as a modulator symbol (any type), the symbol of a mixer, or they use just a square block named modulator.

hm, thank you!

i think i use your second proposal.